*Just over three-fifths of House Democrats hold districts where the share of immigrants exceeds the national level of 14 percent; well over four-fifths of House Republicans hold districts with fewer immigrants than average. Sorting congressional districts by racial diversity and education produces the “four quadrants of Congress”: districts with high levels of racial diversity and white education (“hi-hi” districts), districts with high levels of racial diversity and low levels of white education (“hi-lo districts”), districts with low levels of diversity and high levels of white education (“lo-hi districts”), and districts with low levels of diversity and white education (“lo-lo districts”).